Study of seasonal variations in nine cations of normal term placentas.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D044383:Black People; D002118:Calcium / Q000032:analysis; D003300:Copper / Q000032:analysis; D005260:Female; D006801:Humans; D007477:Ions / Q000032:analysis*; D007501:Iron / Q000032:analysis; D007854:Lead / Q000032:analysis; D008274:Magnesium / Q000032:analysis; D008423:Maternal Age; D010298:Parity; D010920:Placenta / Q000032:analysis*; D011188:Potassium / Q000032:analysis; D011247:Pregnancy; D012621:Seasons; D012964:Sodium / Q000032:analysis; D013053:Spectrophotometry; D044465:White People; D015032:Zinc / Q000032:analysis
D007477:Ions; D007854:Lead; D003300:Copper; D012964:Sodium; D007501:Iron; D008274:Magnesium; D015032:Zinc; D011188:Potassium; D002118:Calcium